Hlohowskyj / Chappaz / Dickson Molybdenum as a Paleoredox Proxy

Past, Present, and Future
Erscheinungsjahr 2021
ISBN: 978-1-009-00245-5
Verlag: Cambridge University Press
Format: PDF
Kopierschutz: Adobe DRM (»Systemvoraussetzungen)

E-Book, Englisch, 0 Seiten

Reihe: Elements in Geochemical Tracers in Earth System Science

Molybdenum (Mo) is a widely used trace metal for investigating redox conditions. However, unanswered questions remain that concentration and bulk isotopic analysis cannot specially answer. Improvements can be made by combining new geochemical techniques to traditional methods of Mo analysis. In this Element, we propose a refinement of Mo geochemistry within aquatic systems, ancient rocks, and modern sediments through molecular geochemistry (systematically combining concentration, isotope ratio, elemental mapping, and speciation analyses). Specifically, to intermediate sulfide concentrations governing Mo behavior below the 'switch-point' and dominant sequestration pathways in low oxygen conditions. The aim of this work is to 1) aid and improve the breadth of Mo paleoproxy interpretations by considering Mo speciation and 2) address outstanding research gaps concerning Mo systematics (cycling, partitioning, sequestration, etc.). The Mo paleoproxy has potential to solve ever complex research questions. By using molecular geochemical recommendations, improved Mo paleoproxy interpretations and reconstruction can be achieved.

Autoren/Hrsg.

Hlohowskyj, Stephan R.

Chappaz, Anthony

Dickson, Alexander J.

Fachgebiete

• Geowissenschaften Geologie Geochemie
• Geowissenschaften Geologie Paläontologie, Taphonomie
• Geowissenschaften Geologie Marine Geologie, Ozeanographie (Meereskunde)

Inhaltsverzeichnis

1. Introduction; 2. Refining redox conditions; 3. Molybdenum speciation; 4. Molybdenum isotopes; 5. Research gaps; 6. Future research directions; 7. Recommended reading.